Exploring sound

• What does data storage in computer systems refer to?


  Recording and retaining information
• Match the sound data storage aspect with its description:

  Representation ↔️ Digital samples capturing amplitude

  Storage Format ↔️ WAV, MP3, and FLAC

  Storage Medium ↔️ Hard drives, SSDs, optical discs
• Steps involved in converting sound waves into digital data

  1️⃣ Sampling

  2️⃣ Quantization
• What does a higher bit depth provide in quantization?

  Better audio fidelity
• Match the storage format with its description:

  WAV ↔️ High quality, uncompressed audio

  MP3 ↔️ Compressed audio with loss of quality

  FLAC ↔️ Lossless compression for audio
• What does a higher sampling rate capture in sound waves?

  More detail
• The sampling rate of a sound wave is measured in Hz
• What are sound waves caused by?

  Variations in air pressure
• Higher bit depths provide better audio fidelity.

  True
• Which sound data storage format is uncompressed and provides high audio quality but results in larger file sizes?

  WAV
• FLAC is a lossless compressed audio format that provides high audio quality while reducing file size more than WAV
• What is the typical capacity range of hard drives for sound data storage?

  500 GB to 10 TB
• Sound data is typically represented as a sequence of digital samples
• The amplitude of a sound wave is measured at regular intervals, called the sampling rate
• Steps involved in converting analog sound waves into digital data

  1️⃣ Sampling

  2️⃣ Quantization
• MP3 is the best format for high-quality audio.

  False
• MP3 uses lossy compression, which reduces file size but lowers audio fidelity
• A 3-minute WAV file with a sampling rate of 44.1 kHz and a bit depth of 16 bits is approximately 30 MB in size.

  True
• One type of data storage is sound data, which represents audio information that can be stored and played
• What are sound waves in terms of air pressure?


  Variations in air pressure
• The sampling rate is measured in Hz
• Sound data is represented as digital samples capturing the amplitude of sound waves.


  True
• In sound quantization, each sample is converted into a discrete numerical value using a specific number of bits
• Common sound data storage formats include WAV, MP3, and FLAC.

  True
• Steps involved in converting sound waves into digital data

  1️⃣ Sampling

  2️⃣ Quantization
• In the sampling process, the amplitude of the sound wave is measured at regular intervals, called the sampling rate
• Steps involved in converting sound waves into digital data

  1️⃣ Sampling

  2️⃣ Quantization
• MP3 uses lossy compression to reduce file size at the expense of audio quality.


  True
• Match the compression type with its description:

  Lossless ↔️ Reduces file size without losing audio quality

  Lossy ↔️ Reduces file size by removing audio data
• A 3-minute audio file in WAV format with a sampling rate of 44.1 kHz and a bit depth of 16 bits would have a file size of around 30 MB.


  True
• What are sound waves and how are they represented digitally?

  Variations in air pressure converted into digital data
• Higher bit depths provide better audio fidelity


  True
• Which two factors determine the quality and file size of stored sound data?

  Sampling rate and bit depth
• What is an example of a lossless compression format?

  FLAC
• Match the storage medium with its typical capacity range:

  Hard Drives ↔️ 500 GB to 10 TB

  SSDs ↔️ 128 GB to 4 TB

  Optical Discs ↔️ 700 MB to 100 GB
• What are the three factors that affect the file size of sound data?

  Sampling rate, bit depth, duration
• Match the memory management technique with its description:

  Buffering ↔️ Stores data ahead of time for continuous playback

  Streaming ↔️ Plays data in chunks to reduce memory use
• What is an example of a lossless compression technique?

  FLAC
• The WAV format is an uncompressed audio format that provides high audio quality
• The file size of sound data depends on factors like sampling rate, bit depth, and duration